Wrapping machine



Jan. 1l, 1927t J. DERRY WRAPPING MACHINE m Ww g. Il

lll l Jan. 11, 1927.

J. DERRY WRAPPING MACHINE Filed August 22. 1923 .4 Sheets-Sheet 2 Jan. 11, 1927. 1,61` 3,986

v J. DERRY WRAPPING MACH'INE Filed August 22. 1923 4 Sheets-Sheet 5 fnvenv'orv J. DERRY WRAPPING MACHINE Jan. 11, 1927. 1,613,986

Filed August 22. 1923 4 Sheets-Sheet 4 th' ckness.

.Patented Jan. 11, i927.

UNITED STATES tenses PATENT lorries.

JASPER nnRRY, oF MEnFonD, MASSACHUSETTS, ASSTGNOR To ANDREW Tnminnsnn,

- or BosToN, MASSACHUSETTS.

WRAPPING MACHINE.

Application filed August 22, 1923. Serial No. 658,767.

This invention relates to wrapping machines of the general type shown and described in an application for Letters Patent tiled J une 21, 1921, by George llihlouty, Serial No. 179,410, and adapted primarily for wrapping annular objects, such, for eX- ample, as automobile tires, coils of wires, etc.

In a machine of this type the object to be wrapped is supported by a pair of rollers which are rotated at constant speed to advance the work through an annular shuttle which is located between said rollers and which is rotated lin a plane transverse tothe direction of movement of the work to apply thereto helical windings of a continuous-strip of wrapping material. In thek machine shown in said prior application the shuttle is vertically adjustable 4in its plane of rotation to centre the same with respect to the article wrapped thereby adapting `the machine to the wrapping of articles of different sizes. It is des'rable that the successive windings of the 'strip overlap a constant amount irrespective of the thickness of the article wrapped, and, inorder to accomplish this result, it is necessary that the wind ngs be applied to an article of relatively small thickness at a greater pitch linclination than those applied to an article of'relatively great The inclination at Which the strip is wound is determined by the direction in which the strip is led from the shuttle to the work, and in accordance with the present .invention the angle at which the str'p engages the work is automatically determined by the thickness of the Awork itself, while'means are provided whereby the portion of the workbeing wrapped is brought substantially parallel to the axis of the shutt-le, so as to cause both edges of the strip to engage the work with equal pressure and prevent undue strain upon either, this result being accomplished simultaneously with the adjustment of the shuttle in accordance with the size of the article wrapped-as above eX- plained.

The foregoing and other object-s of the invention, together with means whereby the same may be carried into efect, will best be understood from the following description of one form or embodiment `thereof illustrated in the accompanying drawings. lt will be understood, however', that theparticula-r construction described'and shown has been chosen for illustrative purposes merely,

and that the invention, as defined by the claims hereunto appended, may be otherwise practiced wthout departure from the spirit and scope thereof.

In said drawings:

Figs. 1 and Q'are front and side elevations, respectively, partly in section, of a wrapping machine embodying the invention.

Fig. 3 is a diagrammatic view illustrating the adjustment of the machine for work of different sizes.

Figs. l and 5 are fragmentary'detail views showing tires of different sizes wrapped with helically wound strips of wrapping material whose inclination or pitch in each case is such as to cause the successive wrappings to overlap a constant amount.

Fig. 6 is a top plan vew and Fig. 7 a 'face view of the shuttle, showing in full and dotted lines respectively, the wrapping strip led therefrom to a relatively large article and to a rcaltively small article.

rlhe frame of the machine comprises a base and a yoke 16 which is pivotally mounted on a shaft 17 journalled in an upright 18 rising` from the base 15. The yoke 16 is provided with guide rollers A.19 for an annular shuttle 20 which is rotated by driving` inember in the form of a friction disk 21 secured to the shaft 17 and driven through connections (not shown in detail) from an electric motor 23 supported on the base 15. The tire or other work lV to be wrapped is supported by rollers 24 and 2510 wh'ch are driven through connections, generally indicated at 25, from the motor 23, the arrangements being such that the work lV will be turned relatively slowly with respect to the speed of rotation of the shuttle 20. The yoke 16 may be adjusted, by means of a handle 22, about the axis of the shaft 17, to centre the shuttle 20 with respect to annular objects of diiferent sizes, said yoke be'ng counterbalanced by a. spring 27 and being locked in adjusted position by means of a clasp 28 to an upright 29 rising from the base 15. The wrapping material, preferably in the form of a continuous strip S of paper, is'herein shown as supplied from a roll 30 on the shuttle 2l), said paper passing from said roll through a folding device 33, and thence about a guide stud 36 to the work lV.

From the foregoing the nature, location and function of the parts referred to will be sufficient-ly understood for the purposes of the lul lill

present case. vWith the except-'on ot those hereinafterl described, and in so 'tar as the others enter into combination therewith, as pointed out in the claims, these parts are not involved in the present invention and may be of any suitable construction and arrangenient.

As in another application, Serial No. 637,658, filed May 9, 1923, by George W. Prouty, the Work supporting rollers 241: and 2st() are carried respectively by standards l() and rising from the base of the machine, and each of said rollers has splined thereto a pair ot sliding` collars d which maybe adjusted toward and 'trom each other on the roller to cause them to engage and laterally position or center objects ot ditterent thickness. Each ot said collars is provided with a circular flange G having an annular peripheral groove which is engaged by pins carried by the uprightarm of bell cranks 49. T he bell cranks i9 are rranged in pairs, there being a pair corresponding to each roller. The corresponding; bell cranks of the several pairs are carried by shafts l joui-nailed in suitable bearings on the standards and 170, While the laterally extending arms ot the bell cranks ot each pair are termed with interengaging parts constituting, in effect, intermeshing gear segments. (lne ot the shafts all is provided with an arm havingan angularly oiset end formed with a longitudinal slot to receive a pin 56 secured to and projecting from the yoke 16. l/Vhen said yoke is adjusted in accordance with the size ot the Work, in order to center the shuttle 2O with respect to said work, the pin 56 Will cause the arm 55 to move predetermined amount, thereby also adjusting the collars l5 on the rollers in accordance with the size ot the Work, as more fully explained in said application Serial No. 637,658.

ln accordance with the present invention, means are also provided tor varying` the angle at which the strip S engages the work, it is wound thereabout, in accordance with the thickness ot the Work. ln Figure 3 the shuttle 20 is shown in l'ull and dotted lines respectively as adjusted into vertical positions in which it will be centered with respect to a relatively larg-e tire or similar annular article lll and a relatively small tire or article Wl, respectively. lt is desirable that the successive windings o't the strip t5 overlap one another a substantially constant amount irrespective ot the thickness ot the article wrapped, and by reference to Figures 4 and it. will be seen that in order to acconiplisl'i this result it is necessary that the strip be wound at a greater inclination on the relatively small tire W" than upon the relatively large tire l l2. Since the rollers Q-l and 240 are rotated at a constant speed irrespective of the size of the Work carried thereby this variation in inclination is determined by the angle at Which the strip is led from the guide stud 36 to the work. To this end, as shown, the stud 36 is disposed at aslight inclination to the Ytace ot the shuttle, and to the path ot' the strip, so as to twist the latter to a certain extent, the arrangement being such, as shown in Fig. 6, that the farther the strip is Wrapped about said stud` the more the strip will be twisted and the greater Will be the angle ivith the iace of the shuttle at whichV said strip is guided to the Work. Thus, as shown in Fig. T, the strip in passing trom the stud to the relatively small tire VJ, will pass about a greater portion otl the peripheryfot the stud th an `vhen passing theretroni to the relatively large tire 72, and vill therefore be led to the tire 71 at a greater angle than to the tire il, as shown in Fig, 3, thereby causing the same to be ivound upon the tire il at a greater inclination than upon the tire VP.

By reason ot this difference in inclination at which the strip is led from the shuttle to the Work, said strip engages the tire lill at a greater distance from the shuttle than the tire 72. t is desirable, however, in order to prevent undue strain upon either edge oic the strip, that the part Vot the work being` Wrapped be as nearly as may be coaxial ivith the shuttle. Thus, in the case ol an annular article such as a tire, it is desirable that the middle ot the strip engage the outer side ot the tire at the point ot tangiency ot the latter with a line (T1 or T2, Fig. 3 drawn parallel to the axis ot the shuttle. For the reasons above stated, this point must be positioned at a greater distance trom the shuttle in the case ot the relatively small tire N1 than in the case ot the relatively large tire lV?. rlhis, in the construction shown, is accomplished by raising or loweringm the Work supportingv roller 240 with respect to the roller 24, sait roller F240 being adjusted into a relatively higher position for the large tire n than Jfor the small tire VJ. This causes the large tire lV to be relatively tilted toward the shuttle with respect to the position ot the small tire VV, shown in Figure 3, thereby bringing;- the loiverinost point oi said relatively larege tire, at which point the strip engages the tire, closer to the shuttle than in the case ot' the smaller tire.

ln accordance with the construction herein shown, the uprights are connected into a unitary structure by a cross web (l0, and are termed with lugs Gl having aligned openings to receive vertical posts (S2 carried by the base. ivliereby said standards are guided tor vertical movement. The transverse web GO is VJornied on its under side with a lue` 63 which passes throughan opening' in the base and rests upon a lever Gel. pivoted atl G5 to a lug 66 secured to the inner side of one of the depending portions 67 of the base. rIhe lug G3 is preferably connected with the lever GJ;l by a screw 69 in threaded engagement with said lug and passing through a slot in said lever. The free end of the lever 64 is connected by a link 68 with the yoke 1G. In order to permit this relative adjustment of the standards l() and 50, the shafts 54 are each 'formed in two sections connected by universal joints 70.

IVith this construction it will be seen that when the yoke 16 is adjusted vertically to center the same with respect to the Work,

the Work supporting roller Q40 will also be automatically adjusted into the proper vertical position to cause the strip S to be Wound in the manner suitable for the particular object being Wrapped. Thus, for example. if the shuttle 2O be lifted from the position shown in dotted lines in Figure 3 into the position shown in full lines therein, in order lo center the saine with respect to the tire lVg, the Work supporting roller 240 will also be lifted from the position shown in dotted lines into that shown in full lines, causing the strip S to engage the tire at a point relatively nearer to the shuttle in accordance with the requirements. It Will also be seen that during this operation the collars Alle will be simultaneously adjusted in accordance with the size of the Work in order properly to centerthe` latter With respect to the shuttle. It therefore follows that a simple vertical adjustment of the shuttle yoke of ful such a character as to center the shuttle with respect to the Work, as can readily be determined by inspection, will be automatically accompanied by such other adjustments ot the machine as may be necessary in order properly to Wrap the object for which the shuttle is adjusted.

Having thus described my invention, I claim:

l. In a machine of the character described, a rotatable shuttle, a plurality ot Work supporting` rollers. and means whereby said shuttle and at least one of said rollers may be simultaneously adjusted to adapt the machine to Work of diiferent sizes.

2. In a machine of the class described, a

rotatable shuttle, an adjustable shuttle supporting yoke, a plurality ofrotatable Work supporting rollers, at least one of said rollers being adjustable to adapt the machine to work of diii'erent sizes, and means operated by said yoke for adjusting said roller.

3. In a machine oit the class described, a rotatable shuttle, an adjustable shuttle supporting yoke, a plurality oit Work supporting rollers, standards by which said rollers are carried, one of said standards being vertically'movable, a lever for supporting said movable standard, and a link connecting` said lever and yoke.

4. In a machine of the class described, a rotatable shuttle,- an adjustable shuttle supporting yoke, a plurality of rotatable rollers for supporting the Work to be Wrapped, at least one ot' said rollers being adjustable to adapt the machine to Work of different sizes, longitudinally slidable collars on said rollers, and, means operated by said yoke for simultaneously adjusting said adjustable roller and said collars.

5. In a machine of the class described, a rotatable shuttle through which the Work is adapted to be moved, an adjustable yoke for supporting said shuttle and adapted to be moved to center the shuttle with respect to the work, a plurality of rotatable rollers for supporting` and moving the Work, at least one ol' said rollers being bodily adjustable to adapt the machine for work of different sizes` longitudinally slidable collars on said rollers, said collars being secured to said rollers so as to revolve therewith, and mechanism operated by said adjustable yoke for adjusting said roller and moving said collars toward and from each other when said yoke is adjusted, Y y

6. In a machine of the class described, the

JASPER DERBY. 

